The mechanical pressure switch uses a bellows-type sensor, suitable for neutral gases such as air, gas, and steam, as well as liquids like water, refrigerants, and oils. The control setpoint is adjustable, with a range of -0.1 to 2.5 MPa.
When the system pressure exceeds or falls below the rated safety pressure, the internal sensor disc moves instantly, triggering the switch to open or close. Once the pressure returns to the set recovery value, the disc resets, and the switch automatically returns to its original state. The switch uses various elastic elements such as single-turn springs, diaphragms, and bellows to control the pressure by changing the switch status.
Product Features
It does not require power supply in the field, eliminating electromagnetic interference.
Window with setpoint adjustment panel for easy on-site configuration.
Equipped with independent normally open and normally closed contacts for greater flexibility of use.
Instrument Parameters
Operating Viscosity
Conventional: < 1×10-³ m²/s
Explosion Test: < 1×10
Explosion Test:
< 1×10−³ m²/s
Switching Element
Conventional: Microswitch
Explosion Proof:
Sealed Switches
Degree of explosion protection
The Explosion Test:
Ex ed II CT4-T6 GB
Degree of protection of the housing
Conventional: IP65
Explosion Proof:
IP54
Ambient Temperature
Conventional & Explosion Proof:
-40℃ to 50℃
Medium Temperature
Conventional & Explosion Proof:
0℃ to 120℃
Mounting Position
Explosion Proof:
Downward Vertical Pressure Connection
Vibration Resistance
Conventional: Max. 40 m/s²
Explosion Test:
Max. 20 m/s²
Repeatability Error
Conventional & Explosion Test:
≤ 1.5%
Contact Capacity
AC 220V: 6A (resistive load)
DC 250V: 0.25A (resistive load) 60W max.
AC 250V: 5A (resistive load) 1250 VA max.
